Fix using in CalendarController

src/Radarr.Api.V3/Calendar/CalendarController.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using System.Resources;
 using Microsoft.AspNetCore.Mvc;
 using NzbDrone.Common.Extensions;
 using NzbDrone.Core.Configuration;